This is a direct bolt-in Flex-a-fit® aluminum radiator and electric fan combo for the Jeep Wrangler JK with Hemi engine conversions. The T channels offer 130 percent better heat transfer, a durable mounting system for the radiator, electric fan and optional oil cooler or expansion tank. The dual 1-inch all-aluminum radiator core is hand welded in the U.S. to the Flex-a-fit sidetanks. This radiator comes with a Flex-a-lite 16-inch electric fan pre-mounted in a full shroud as well as a Flex-a-lite Variable Speed Controller.